Chung Hyun, who arrested an innocent citizen as a suspect, is hit by the media, and Se-hyun, who helps him, announces a serial murder. Se-hyun, who reveals his existence to Cho Kyun, tries to stimulate him and pull him over the surface.

Se-hyun finds her childhood photographs planted by Cho Kyun in the third body and is shocked. Se-hyun, who is in a hurry by the caught clue, heads to Hae-ryong, who lived with Jo Kyun in the past. There, there is a faces of Cho Kyun and his new murder assistant, Se-eun.